If you plan to apply to the Presidential Management Fellows program November 5-November 19, then you should prepare for the online assessment. To apply to the program, candidates take an online, untimed online assessment. The score from that assessment will determine the candidates selected to participate in the in-person assessment.
The 2012 Assessment Guide has now been updated and posted on the PMF website. It can be found here: http://www.pmf.gov/media/43126/2013%20pmf%20assessment%20preparation%20guide%2010-18-12.pdf